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Proceedings Paper

Physical-optics analysis of lightguides for augmented and mixed reality glasses (Conference Presentation)
Author(s): Christian Hellmann; Stefan Steiner; Roberto Knoth; Site Zhang; Frank Wyrowski

Paper Abstract

Lightguides in combination with gratings seem to be a promising candidate for the development of AR/MR glasses. The research and development of this technique is done in numerous companies and institutes and there is still a lot of room for new ideas and innovations. The design and the modeling of such lightguides is very different to lens design and requires new techniques in modeling. Though ray tracing gives insight also in the case of lightguides, an analysis which includes all relevant effects must be based on a physical-optics approach which is fast and user-friendly. With the Fast Physical Optics technique in our software VirtualLab Fusion we provide such a modeling approach. We include the polarization of the in-coupled light, fully vectorial grating analysis, coherence, interference and diffraction effects in the analysis carried out in one software platform, with a fully non-sequential consideration of the lightpaths through the lightguide. In the talk we briefly explain the underlying modeling concepts and demonstrate analysis results for a specific FOV with respect to merit functions like uniformity in the eyebox, uniformity and MTF over the FOV for an example design done in VirtualLab Fusion. We address computation speed and distributed computing.

Paper Details

Date Published: 27 July 2019
Proc. SPIE 11062, Digital Optical Technologies 2019, 110620I (27 July 2019); doi: 10.1117/12.2527875
Show Author Affiliations
Christian Hellmann, Wyrowski Photonics UG (Germany)
Stefan Steiner, LightTrans International UG (Germany)
Roberto Knoth, LightTrans International UG (Germany)
Site Zhang, LightTrans International UG (Germany)
Frank Wyrowski, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 11062:
Digital Optical Technologies 2019
Bernard C. Kress; Peter Schelkens, Editor(s)

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